Replaceable modularized grout stopping plate

Abstract

The utility model relates to the technical field of slurry stopping plates of shield tunneling machines, and provides a replaceable modularized slurry stopping plate. The replaceable modularized slurry stopping plate comprises a sealing plate and a flow distribution plate, the sealing plate is fixedly connected with the bottom of a shield body, and the outer edge of the sealing plate abuts against the inner wall of a shield tunneling machine tunnel; the splitter plate is fixedly connected with the side wall, away from the shield body direction, of the sealing plate, the splitter plate is parallel to the inner wall of a shield tunneling machine tunnel, and the length of the splitter plate is at least five times of the distance between the splitter plate and the inner wall of the shield tunneling machine tunnel. According to the replaceable modularized slurry stopping plate, the flow dividing plate is arranged for dividing the cement slurry to reduce the flowing section of the cement slurry, the flowing capacity of the cement slurry is reduced, the requirement for the blocking effect of the cement slurry on the sealing plate is lowered, and the risk of overflowing and channeling of the cement slurry is lowered.

Description

Technical Field

[0001] The utility model relates to the technical field of slurry stop plates of shield machines, in particular to a replaceable modular slurry stop plate. Background Art

[0002] When a shield machine excavates a tunnel, cement slurry is used to fix the segment to support the tunnel. To prevent the cement slurry from overflowing and flowing outside the shield body and affecting the operation of the shield body, a slurry stop plate is provided on the shield machine to block the overflow and flow of the cement slurry.

[0003] In the prior art, the edge of the slurry stop plate usually abuts against the tunnel of the shield machine, or a sealing brush is provided at the edge of the slurry stop plate to abut against the tunnel of the shield machine. There are serious friction loss problems when the edge of the slurry stop plate directly abuts, resulting in a decrease in the effect of blocking the cement slurry; using a sealing brush to abut can alleviate the friction loss problem, but the blocking effect of the sealing brush itself on the cement slurry is not as good as that of the slurry stop plate, resulting in a high risk of cement slurry overflow and flow. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a replaceable modular slurry stop plate. The replaceable modular slurry stop plate is provided with a flow dividing plate to divide the cement slurry, reduce the flow cross-section of the cement slurry, and reduce the flow capacity of the cement slurry. The requirement for the blocking effect of the cement slurry on the sealing plate decreases, and the risk of cement slurry overflow and flow decreases.

[0005] The utility model provides a replaceable modular slurry stop plate, including:

[0006] A sealing plate, the sealing plate is fixedly connected to the bottom of the shield body, and the outer edge of the sealing plate abuts against the inner wall of the tunnel of the shield machine;

[0007] A flow dividing plate, the flow dividing plate is fixedly connected to the side wall of the sealing plate away from the shield body, the flow dividing plate is parallel to the inner wall of the tunnel of the shield machine, and the length of the flow dividing plate is at least five times the distance between the flow dividing plate and the inner wall of the tunnel of the shield machine;

[0008] The flow dividing plate divides the cement slurry to reduce the flow cross-section of the cement slurry.

[0009] Preferably, a sealing brush is fixedly connected to the outer edge of the sealing plate, and the bristles of the sealing brush abut against the inner wall of the tunnel of the shield machine.

[0010] Preferably, a clamping groove is integrally formed on the sealing plate, and the sealing brush is clamped in the clamping groove.

[0011] Preferably, the bristles of the sealing brush incline towards the flow dividing plate.

[0012] Preferably, after the bristles of the sealing brush incline and abut against the inner wall of the tunnel of the shield machine, the tips of the bristles of the sealing brush extend along the inner wall of the tunnel of the shield machine.

[0013] Preferably, a support plate is integrally formed on the flow splitting plate. One end of the support plate is connected to the side wall of the flow splitting plate close to the shield machine, and the other end of the support plate is connected to the shield machine.

[0014] Preferably, a flow suppressing plate is integrally formed on the flow splitting plate. The flow suppressing plate is connected to the side wall of the flow splitting plate away from the shield machine, and the flow suppressing plate is parallel to the sealing plate.

[0015] Preferably, the size of the flow suppressing plate is at least half of the distance between the flow splitting plate and the inner wall of the shield machine tunnel.

[0016] Preferably, the flow suppressing plates are evenly distributed on the flow splitting plate, and the distance between two adjacent flow suppressing plates is equal to the distance between the flow splitting plate and the inner wall of the shield machine tunnel.

[0017] Preferably, the replaceable modular grout stop plate further includes a barometric sensor. The barometric sensor is located between the flow splitting plate and the shield machine, the barometric sensor is fixedly connected to the side wall of the sealing plate, and the barometric sensor is electrically connected to the control center of the shield machine.

[0018] The technical solution of the present utility model splits the cement slurry into two parts through the flow splitting plate. The cement slurry located between the flow splitting plate and the inner wall of the shield machine tunnel overflows towards the edge of the sealing plate. The flow cross-section of the cement slurry entering between the flow splitting plate and the inner wall of the shield machine tunnel becomes smaller from larger, so that the flow capacity of this part of the cement slurry decreases, the impact force of the cement slurry on the sealing plate decreases, and the risk of cement slurry overflow decreases. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 is the assembly drawing of a replaceable modular grout stop plate of the present utility model;

[0021] Figure 2 is Figure 1 the enlarged view of part A in;

[0022] Figure 3 is Figure 1 the axonometric drawing of the replaceable modular grout stop plate in;

[0023] Figure 4 is Figure 3 the enlarged view of part B in;

[0024] Figure 5 isFigure 3 Enlarged view of part C

[0025] Description of reference numerals:

[0026] 1. Sealing plate; 11. Sealing brush; 12. Clamping groove; 2. Flow splitting plate; 21. Support plate; 22. Flow restraining plate; 3. Air pressure sensor. Specific embodiments

[0027] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0029] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined. In addition, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] Combined with Figures 1 to 5 As shown, a replaceable modular grout stopping plate provided by the present utility model includes a sealing plate 1 and a flow splitting plate 2.

[0031] Combined with Figures 1 to 5As shown, the sealing plate 1 is fixedly connected to the bottom of the shield body, and the outer edge of the sealing plate 1 abuts against the inner wall of the shield machine tunnel; the diversion plate 2 is fixedly connected to the side wall of the sealing plate 1 away from the shield body, the diversion plate 2 is parallel to the inner wall of the shield machine tunnel, and the length of the diversion plate 2 is at least five times the distance between the diversion plate 2 and the inner wall of the shield machine tunnel; the diversion plate 2 diverts the cement slurry to reduce the flow cross-section of the cement slurry.

[0032] In this embodiment, the diversion plate 2 diverts the cement slurry into two parts. The cement slurry located between the diversion plate 2 and the inner wall of the shield machine tunnel overflows towards the edge of the sealing plate 1. The flow cross-section of the cement slurry entering between the diversion plate 2 and the inner wall of the shield machine tunnel changes from large to small, so that the flow capacity of this part of the cement slurry decreases, the impact force of the cement slurry on the sealing plate decreases, and the risk of cement slurry overflow decreases.

[0033] In this embodiment, the diversion plate 2 suppresses the flow capacity of the cement slurry by means of a small clearance flow cross-section. The distance between the diversion plate 2 and the inner wall of the shield machine tunnel directly affects the effect of suppressing the flow capacity of the cement slurry. The shorter the length of the diversion plate 2 required for the stronger the effect of suppressing the flow capacity, so the length of the diversion plate 2 is in a proportional relationship with the distance.

[0034] In some embodiments, in combination with Figure 2 、 Figure 4 As shown, a sealing brush 11 is fixedly connected to the outer edge of the sealing plate 1, and the bristles of the sealing brush 11 abut against the inner wall of the shield machine tunnel. Using the sealing brush 11 instead of the edge of the sealing plate 1 to abut against the inner wall of the shield machine tunnel can alleviate the problem of frictional wear. The sealing brush 11 is usually made of wear-resistant materials and has a longer frictional life, and since the bristles of the sealing brush 11 are softly fixed, the wear of the bristles is further reduced.

[0035] In some embodiments, in combination with Figure 4 As shown, a clamping groove 12 is integrally formed on the sealing plate 1, and the sealing brush 11 is clamped in the clamping groove 12. After the sealing brush 11 is adopted, the main wear occurs on the sealing brush 11, and the sealing plate 1 itself is basically no longer affected by wear. By designing the clamping groove 12 for clamping, modularization of the high-wear part and the low-wear part can be realized. By replacing the highly worn sealing brush 11, the service life of the sealing plate 1 can be utilized to the greatest extent, and the economic performance can be improved.

[0036] In some embodiments, in combination with Figure 2 、 Figure 4As shown, the bristles of the sealing brush 11 are inclined towards the deflector plate 2. When the bristles are perpendicular, a higher requirement is imposed on the length of the bristles. If the bristles are too long, they will not be able to straighten and gaps will be generated. If the bristles are too short, they will not be able to fully contact the inner wall of the shield machine tunnel, both of which will affect the sealing effect. The inclination of the bristles towards the deflector plate 2 causes the cement slurry to exert a certain pressing effect on the bristles. At the same time, the inclined bristles can, within a relatively large length range, achieve contact with the inner wall of the shield machine tunnel of different lengths through the elasticity of the bristles themselves.

[0037] In some embodiments, in combination with Figure 2 As shown, after the bristles of the sealing brush 11 are inclined to contact the inner wall of the shield machine tunnel, the tips of the bristles of the sealing brush 11 extend along the inner wall of the shield machine tunnel in contact. At this time, the length of the bristles of the sealing brush 11 is relatively long, and the elasticity of the bristles themselves can increase the contact effect of the bristles. At the same time, after the bristles are worn, the overly long part of the bristles will continue to contact the inner wall under the action of only the elastic force, realizing long-term use with a single replacement of the sealing brush.

[0038] In some embodiments, in combination with Figure 2 、 Figure 5 As shown, a support plate 21 is integrally formed on the deflector plate 2. One end of the support plate 21 is connected to the side wall of the deflector plate 2 close to the shield machine, and the other end of the support plate 21 is connected to the shield machine. The design of the support plate 21 improves the structural strength of the deflector plate 2, enabling the deflector plate 2 to withstand the impact of stronger cement slurry and improving the working stability of the deflector plate 2.

[0039] In some embodiments, in combination with Figure 2 、 Figure 5 As shown, a flow suppression plate 22 is integrally formed on the deflector plate 2. The flow suppression plate 22 is connected to the side wall of the deflector plate 2 away from the shield machine, and the flow suppression plate 22 is parallel to the sealing plate 1. The function of the flow suppression plate 22 is to limit the magnitude of the flow rate and can disrupt the flow direction when the cement slurry flows through at a high speed.

[0040] In this embodiment, the flow suppression plate 22 can be replaced by a surface of the deflector plate 2 with a large undulation, and the same effect of disrupting the flow direction and limiting the magnitude of the flow rate can be achieved. The flow suppression plate 22 can be perpendicular to the surface of the deflector plate 2. However, when the flow suppression plate 22 is inclined, it will have a certain flow diversion effect and can better limit the flow rate.

[0041] In some embodiments, in combination with Figure 2 、 Figure 5 As shown, the size of the flow suppression plate 22 is at least half of the distance between the deflector plate 2 and the inner wall of the shield machine tunnel. The flow suppression plate 22 needs to have a sufficient size to function.

[0042] In some embodiments, in combination with Figure 2 、 Figure 5As shown, the flow restrictor plates 22 are evenly distributed on the flow splitter plate 2. The distance between two adjacent flow restrictor plates 22 is equal to the distance between the flow splitter plate 2 and the inner wall of the shield machine tunnel. Increasing the number of flow restrictor plates 22 is the most direct way to limit the flow rate. However, a certain gap needs to be reserved between adjacent flow restrictor plates 22 to disrupt the flow direction.

[0043] In some embodiments, in combination with Figure 2 As shown, the replaceable modular grout stop plate further includes a barometric pressure sensor 3. The barometric pressure sensor 3 is located between the flow splitter plate 2 and the shield machine. The barometric pressure sensor 3 is fixedly connected to the side wall of the sealing plate 1. The barometric pressure sensor 3 is electrically connected to the control center of the shield machine. When the cement slurry enters the space between the flow splitter plate 2 and the shield machine, a sealed chamber is formed and the air cannot escape. As the cement slurry enters, the internal air pressure will gradually increase. By monitoring the barometric pressure information through the barometric pressure sensor 3, the position of the cement slurry can be judged, and the information is transmitted to the control center of the shield machine to realize the automatic adjustment of the pouring speed of the cement slurry by the shield machine, thereby reducing the risk of overflow and leakage at the source.

[0044] Working process:

[0045] The cement slurry is split into two parts under the action of the flow splitter plate 2. The part that enters the gap between the flow splitter plate 2 and the inner wall of the shield machine tunnel has a risk of overflow and leakage. Before and after passing through the sealing plate 1, the flow cross-section of the cement slurry changes from large to small. When the cement slurry is in the small cross-section, its flow capacity decreases, the speed of the cement slurry overflowing to the sealing plate 1 decreases, and because the flow cross-section is small, during the advancement of the shield machine, the inner wall of the shield machine tunnel will have a greater inhibitory effect on the overflow and leakage of the cement slurry, and the risk of the cement slurry overflowing through the sealing plate 1 decreases.

[0046] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A replaceable modular stop plate, characterized in that: include: A sealing plate (1), the sealing plate (1) being fixedly connected to the bottom of the shield body, and the outer edge of the sealing plate (1) being in contact with the inner wall of the shield machine tunnel; A diverter plate (2), the diverter plate (2) being fixedly connected to the side wall of the sealing plate (1) away from the shield body, the diverter plate (2) being parallel to the inner wall of the shield tunnel, and the length of the diverter plate (2) being at least five times the distance between the diverter plate (2) and the inner wall of the shield tunnel; The diverter plate (2) diverts the cement slurry to reduce the flow cross section of the cement slurry.

2. The replaceable modular stop plate according to claim 1, characterized in that: A sealing brush (11) is fixedly connected to the outer edge of the sealing plate (1), and the bristles of the sealing brush (11) are in contact with the inner wall of the shield machine tunnel.

3. The replaceable modular stop plate according to claim 2, characterized in that: The sealing plate (1) is integrally formed with a clamping groove (12), and the sealing brush (11) is clamped in the clamping groove (12).

4. The replaceable modular stop plate according to claim 2, characterized in that: The bristles of the sealing brush (11) are inclined towards the diverter plate (2).

5. The replaceable modular stop plate according to claim 4, characterized in that: After the bristles of the sealing brush (11) are inclined to contact the inner wall of the shield machine tunnel, the tips of the bristles of the sealing brush (11) extend along the inner wall of the shield machine tunnel.

6. The replaceable modular stop plate according to claim 1, characterized in that: A support plate (21) is integrally formed on the diverter plate (2), one end of the support plate (21) is connected to the side wall of the diverter plate (2) close to the shield machine, and the other end of the support plate (21) is connected to the shield machine.

7. The replaceable modular stop plate according to claim 1, characterized in that: The diverter plate (2) is integrally formed with a flow suppression plate (22), the flow suppression plate (22) is connected to the side wall of the diverter plate (2) away from the shield machine, and the flow suppression plate (22) is parallel to the sealing plate (1).

8. The replaceable modular stop plate according to claim 7, characterized in that: The size of the flow suppression plate (22) is at least half of the distance between the flow dividing plate (2) and the inner wall of the shield machine tunnel.

9. The replaceable modular stop plate according to claim 7, characterized in that: The flow suppression plates (22) are evenly distributed on the diverter plate (2), and the distance between two adjacent flow suppression plates (22) is equal to the distance between the diverter plate (2) and the inner wall of the shield machine tunnel.

10. The replaceable modular stop plate according to claim 1, characterized in that: It also includes an air pressure sensor (3), which is located between the diverter plate (2) and the shield machine, the air pressure sensor (3) is fixedly connected to the side wall of the sealing plate (1), and the air pressure sensor (3) is electrically connected to the control center of the shield machine.

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